WP_User::init( object $data, int $site_id = '' )

Source

File: wp-includes/class-wp-user.php

public function init( $data, $site_id = '' ) {
		if ( ! isset( $data->ID ) ) {
			$data->ID = 0;
		}
		$this->data = $data;
		$this->ID   = (int) $data->ID;

		$this->for_site( $site_id );
	}